摘要
为提高泥浆护壁条件下开挖稳定性的认识,在收集和整理现有研究成果的基础上,分析了泥浆护壁开挖稳定性的影响因素,包括泥浆性质、地基土质条件、开挖槽段的形状以及施工机械和工艺等。同时,根据现场试验和理论研究成果,从土拱效应、时间效应、整体稳定性和局部稳定性等方面分析了泥浆护壁开挖的失稳机理。结果表明,浅层槽壁失稳是泥浆护壁开挖的主要失稳型式,开挖槽段的长度和泥浆液面与地下水位面的高差是控制泥浆护壁开挖稳定性的关键参数。
In order to improve the understanding of excavation stability under slurry supporting condition, an analysis was performed of some influencing factors, including the properties of slurry, the ground condition, the shape of excavated trenches, the operation of excavation equipment, the workmanship of construction, etc. Based on field test and theoretical analysis, the mechanism of instability of slurry-supported excavations was investigated from angles of soil arching effect, time-dependent effect, overall stability, and local stability. The result shows that the trench wall failure at shallow depth is the major failure mode of the slurry-supported excavation, and that the length of the excavated trenches and the difference between the slurry head and the water level are the key parameters controlling the stability of the slurry-supported excavation.
出处
《水利水电科技进展》
CSCD
北大核心
2006年第1期82-86,共5页
Advances in Science and Technology of Water Resources
关键词
泥浆护壁开挖
稳定性
失稳机理
土拱效应
膨润土泥浆
slurry-supported excavation
stability
mechanism of instability
soil arching effect
bentonite slurry
作者简介
雷国辉（1972-）．男，江西丰城人．副教授，博士，从事软土地基处理及基础工程研究。E-mail：leiguohui@hhu．edu．cn
